Goodwill, Trade Names, and Other Intangible Assets - Changes in Carrying Amount of Goodwill by Segment (Detail) - USD ($)	3 Months Ended	12 Months Ended
	Jun. 30, 2016	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Goodwill balances
Goodwill, net of impairment loss, beginning of period		$ 95,096,000
Goodwill, Translation and Purchase Accounting Adjustments [Abstract]
Impairment charges			$ 0	$ 0
Goodwill, net of impairment loss, end of period		79,648,000	95,096,000
Physician Staffing Segment
Goodwill, Translation and Purchase Accounting Adjustments [Abstract]
Impairment charges	$ (17,700,000)
Operating Segments
Goodwill balances
Goodwill, net of impairment loss, beginning of period		95,096,000
Accumulated impairment loss, beginning of period		(259,732,000)
Sale of CCE		(9,889,000)	(9,889,000)
Aggregate goodwill acquired, beginning of period		364,717,000
Goodwill, Translation and Purchase Accounting Adjustments [Abstract]
Goodwill acquired		2,272,000
Impairment charges		(17,720,000)
Aggregate goodwill acquired, end of period		366,989,000	364,717,000
Accumulated impairment loss, end of period		277,452,000	259,732,000
Goodwill, net of impairment loss, end of period		79,648,000	95,096,000
Operating Segments | Nurse and Allied Staffing Segment
Goodwill balances
Goodwill, net of impairment loss, beginning of period		42,273,000
Accumulated impairment loss, beginning of period		(259,732,000)
Sale of CCE		0	0
Aggregate goodwill acquired, beginning of period		302,005,000
Goodwill, Translation and Purchase Accounting Adjustments [Abstract]
Goodwill acquired		2,272,000
Impairment charges		0
Aggregate goodwill acquired, end of period		304,277,000	302,005,000
Accumulated impairment loss, end of period		259,732,000	259,732,000
Goodwill, net of impairment loss, end of period		44,545,000	42,273,000
Operating Segments | Physician Staffing Segment
Goodwill balances
Goodwill, net of impairment loss, beginning of period		43,405,000
Accumulated impairment loss, beginning of period		0
Sale of CCE		0	0
Aggregate goodwill acquired, beginning of period		43,405,000
Goodwill, Translation and Purchase Accounting Adjustments [Abstract]
Goodwill acquired		0
Impairment charges		(17,720,000)
Aggregate goodwill acquired, end of period		43,405,000	43,405,000
Accumulated impairment loss, end of period		17,720,000	0
Goodwill, net of impairment loss, end of period		25,685,000	43,405,000
Operating Segments | Other Human Capital Management Services Segment
Goodwill balances
Goodwill, net of impairment loss, beginning of period		9,418,000
Accumulated impairment loss, beginning of period		0
Sale of CCE		(9,889,000)	(9,889,000)
Aggregate goodwill acquired, beginning of period		19,307,000
Goodwill, Translation and Purchase Accounting Adjustments [Abstract]
Goodwill acquired		0
Impairment charges		0
Aggregate goodwill acquired, end of period		19,307,000	19,307,000
Accumulated impairment loss, end of period		0	0
Goodwill, net of impairment loss, end of period		$ 9,418,000	$ 9,418,000